import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/welcome'
import Users from '../components/user/Users'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles }
      ]
    }
  ]
})

// 挂载路由导航首位
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 从哪个路径跳转
  // next是一个函数
  // next()放行 next('/login') 强制放行
  if (to.path === '/login') return next()
  //  获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})
export default router
